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GrogVix [38]
3 years ago
5

Solve -3x - y = 8 - 7x + 3y = -24

Mathematics
2 answers:
Nookie1986 [14]3 years ago
7 0
The solution is (0,-8)
My name is Ann [436]3 years ago
3 0

Answer:

1.x1=49.5 or x2=-48.5

Step-by-step explanation:

=-3x-y-8=8-8

=-3x-y-8=0 --> a=-3 b=-1 c=-8

solve it using quadratic formula

=-(-1)±√(-1)^2-4(-3)(-8)/2

= 1±√2+96/2

=1±√98/2

=1+98/2 ----> x1=49.5

=1-98/2 -----> x2=-48.5

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Angle 1 and Angle 2 are supplementary. Angle 1 is 20 degree less than nine times the size of angle 2.
nadya68 [22]

Answer:

∠1=160° and ∠2=20°

Step-by-step explanation:

Let ∠1 = x

∠2 = y

as these two angles are supplementary their sum is 180

that x+y=180   ----(A)

Also given that ∠1 is 20 degree less than nine times the size of ∠2.

Hence

x=9y-20

putting value of x in A and solving for y

9y-20+y=180

10y=180+20

10y=200

y=10

Putting this y in A

x+10=180

x=160

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Given ΔBAE is isosceles with base angles ∠BEA and ∠EBA and that ∠AEC = 115°, is ΔEBC ~ ΔAEC? If so, by what criterion?
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ΔEBC ~ ΔAEC <span>by AA criterion</span>
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2 years ago
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
What is the decimal value of 3 quarters and 2 dimes?
Radda [10]

Answer:

0.95

Step-by-step explanation:

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